User interface for a mobile electronic device



FIG. 1 is a front view of a user interface for a mobile electronic device; and,

FIG. 2 is a front view thereof, the user interface is shown separately for clarity of illustration, on an enlarged scale.

The broken line drawing of a mobile electronic device in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a user interface for a mobile electronic device, as shown and described. 